﻿/*  CamHelper (See http://camhelper.codeplex.com/ or https://bitbucket.org/AndiKS/camhelper for more Info)
    Copyright (C) 2011 Andreas Wimmer

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

using System;
using System.Collections.Generic;
using System.Text;

namespace CamHelper.Facade.TopSolid
{
    public static class InstanceWatcher
    {
        private static Dictionary<Type, int> _cache;
        private static object syncroot = new object();

        public static void Increment(Type type)
        {
            lock (syncroot)
            {
                if (_cache == null)
                    _cache = new Dictionary<Type, int>();

                if (!_cache.ContainsKey(type))
                    _cache[type] = 1;
                else
                    _cache[type]++;
            }
        }

        public static void Decrement(Type type)
        {
            lock (syncroot)
            {
                _cache[type]--;
            }
        }

        public static string CreateResult()
        {
            lock (syncroot)
            {
                var result = new StringBuilder();

                foreach (var item in _cache)
                {
                    result.AppendFormat("{0}: {1}{2}", item.Key, item.Value, Environment.NewLine);
                }

                return result.ToString();
            }
        }
    }
}
